Przejdź do głównej zawartości

Popularne posty z tego bloga

$7dc

There was not much progress in 2011. I've been lately very busy with my work projects ( this and this one). But at least i've prepared a TO-DO list for 2012 ;) : 1. VEGA ( Olympia, 1982 ) I have recently got Vega PCB. Special thanks to Mark Frisbee for help. Unfortunately board has few faults ( no sound, gfx glitches ) and inverted colors (like early Nintendo boards). Theres a couple solutions for the latter problem. I have decided to mod the pcb a bit and invert the digital signals before the DAC (made of resistors). Here's a video from attract mode: So, next step is to emulate the game :) 2. TIME ATTACKER ( Shonan, 1980 ) Currently i'm making schematics of video section. It's similar to classic Pong discrete logic, but a bit more complicated (game has Z80 cpu). TA is a breakout clone, with special add-ons like oil zones and moving enemies ( btw : background color - blue or black - is selectable with a jumper on board ): 3. WHEELS & FIRE ( ...
Prześlij komentarz
Czytaj więcej

The art of rippping.

New board arrived. " Spinkick " by Seojin/Heasung (notice the big epoxy block with "HEC" logo). PCB is 'almost' working, but there's no way to insert coin(s) and start the game (probably one of the input buffer chips is broken... very common). And yes, it's rip-off of the Sega's "Free Kick" game, running on really weird korean hardware based on MSX2 home computer ( plus additional sound cpu (Z80) and extra logic to handle a bit different (than in MSX2) rom banking ). Game ROMs contains hacked MSX2 bios - they removed all (c) texts, blanked font area and added few mods here and there to skip boot sequence. Also, for some unknown reason, Yamaha v9938 VDP is hidden in big and heavy epoxy block. Probably to make a fake impression of being orginal, not stolen piece of hardware. So .. what's the point of use MSX2 as the base ? I have NO idea... Imho it's way easier to start from scratch and design own, simple hardware (vdp...
1 komentarz
Czytaj więcej

Sonic Blast Man.

Few words about an arcade bootleg game called ' Sonic Blast Man 2 Special Turbo '. The game is a slighty modified copy of Taito's 'Sonic Blast Man 2'. It runs on hardware ( custom chinese, not the NSS ) "borrowed" from Super Nintendo home console. Just few eproms, rams, three custom QFP chips (there's also another, odler version of the hw, with 6 of them) and Lattice PLD - to handle the most annoying part, protection. So... What's the point to encrypt/protect pirate game? To hide the 'real' (in fact - stolen ) game code and data? Or maybe to annoy other bootlegers? No idea. Kold666 already dumped the ROMs while ago. Unfortunately the pcb is no longer available for additional testing or analysis. The data encryption is not as simple as in other arcade SNES hacks (Killer Instinct, Final Fight 2). But with great help from Andreas Naive it's finally broken. Also the in-game protection checks are now gone (took me a couple of hours t...
3 komentarze
Czytaj więcej